the other day when driving i had a jerking movement for a couple of miles then had as plum of grey smoke about 200-300 yards down the road it cut out and would'nt start at all when to a friend who replaced the fuel filter and test drove it and told me he had it running without a hitch picked it up today and the problem is still there it cut out again no glow plug light comes on so he cant read the error codes , need help please